Bolting-up machine



A. B. CLARK. BOLTING UP MACHINE. APPLICATION FILED-MAIL 17, 1919.

Patent/ed Mm. 15,1921.

UNITED STATES ARCHER B. CLARK, OF SEATTLE, W'ASINGTON.

BOLTING-nr MACHINE.

Speciication of Letters Patent. Pgmjntgd Rial, 15, '1921.'

Application led March 17, 1919. Serial No. 283,083..v

To all whom t may concern:

Be it known that I, ARCHER B. CLARK, a citizen ot the United States, andresident of Seattle., in the, County of King and State ot iVashington,have invented certain new and useiul improvements in Bolting-UpMachines, or which the jfollowing is a clear and exact specification.

This invention relates to improvements 1n hydraulic bolting up machinesof the type that may be used for drawing together and holding together aplurality of plates and the object ot this improvement is to provide ahydraulic device of this nature that is strong and simple inconstruction, rapid and et'ricient in operation and that is capable oi'exerting a powerful force on the opposite sides of two or more plates todraw such plates together.

.fr further object is to provide means within a tool of this nature forgripping and holding the end or" a draw bolt by which the platesaredrawn together and to provide simple and efficient means separablefrom the tool for engaging Vwith the draw boltto hold the platestogether after the force exerted by the hydraulic device released.

A still further obj ect is to provide quickly releasable draw bolts andlocking collars that mayy be usedwith my hydraulic machine and by whichtwo or more plates mayV be drawn together and held in position forriveting without'the use of threaded bolts and nuts. Y

This device is especially adapte-d for use in drawing together andholding together the steel plates of a ships hull preparatory to theriveting of such plates.

In the accompanying drawings Figure l is a view in longitudinalmidsection ot a device constructed in accordance with this invention,certain parts being shown in elevation; Fig. 2 is an enlarged view incross section illustrating the valves in the parti- 1 tionvwall thatdivides the main cylinder of the machine .into two compartments; Figs. 3and 4L are enlarged views in cross section on broken lines 3 3 and et-ftrespectively, of Fig'. l; .and Fig. 5 is a fragmentary view in crosssection substantially on broken line 5 5 of Fig. l.

At the present time it is common practice tov-draw the steel plates thatform the sides of a ship ytogether and hold them temporarily in place byinserting bolts through l perforations l0 in the Referring to thedrawings,v`f throughout which like reference vnumerals designate-like.

partez the numerals (i and designate two plat-es that are to be drawn.together and 8 designates a draw bolt that is provided with a head 9and is adapted to be passed through plates 6 andi7 to draw the platestogether. v rEhe hydraulicapparatus proper comprises a smaller cylinderVll and a larger cylinderA l2 that is open at one end and is adapted toslide telescopically overthe outside of the smaller cylinder, a packinggland 13 being provided in the interior vwall. of the larger cylinderadjacent the end thereof to insure an absolutely4 leak proof tit betweenthe two cylinders 1l and l2.

The outer end of the smaller cylinder l1 is adapted to have a cap 14screwed thereon,

the cap 14 being provided withl an axial bore through which the drawbolt 8 may pass and being adaptedto abut against thev end of a sleeve l5and Vpressthe sleeve against the inner plate 6. y Y v Thefsleeve 15 isprovided with a tapered recess 16 thatis adapted for the yreception of aball .bearing cage 17 whereinare disposed balls `18 that are arranged towedge between the inner tapered wall Yof therecess 16 and the outerycylindrical wall of the pin 8 in suchmal1mer as to lock the sleeve inany position on the pin. The ball n bearing cage 17 is of reduceddiameter nearl the inner end to form a'shoulderQO. against which oneendof alrelatively light compression spring Ql'may engage, lthe othery endof the spring 21 being arranged to abut against a ring 22 which isslightly embedded in and lixedly secured to the inner peripheral wall ofthe sleeve l5. The end ofthe cap 14: is recessed as at 23 to affordclearance for the endvof the ball bearing cage lr( *Y which projectsvfrom the end or' the sleeve l5 and is shaped so that itl'may be engagedby a tool to pry ito-utwardly and cause the balls to release the drawbolt. i

AThe inner end of the drawbolt 8 `is ar- 1 lio ranged to project throughan axially disposed opening in a cylindrical block or member 24 that isscrewed onto one end off a shank 25, the shank 25 being recessed as at26 to permit the draw bolt to work therein. The other `end 4of the`shank 25 is externally threaded and is screwed into a relatively thickcylinder head o-r partition wall 27 which is screwed into the largercylinder 12 at a point a short distance from the outer end thereof, thearrangement being such that the block 24, shank 25 partition wall 27 andlarger cylinder 12 are all rigid with `respect to each other.

The end "of the smaller cylinder 11 that projects intoV the largercylinder 12 has a bushing `28 screwed Atherein that is adapted to fitthe shank 25 and is provided with a packing gland 30 to insure a `leakproof joint between it and such `shank 25.

The bushing 28 which in effect forms the end -wall of the smallercylinder 11 has an annular cup shaped packing ring secured thereto by awasher The washerl is secured to the bushing 28 by screws 34 the headsof which are shaped as shown in F ig. 1 and are perforated for thereception of the end coil of a tension spring 36. The annular' packingring 32 makes a close lit with the inner walls of the largercylinder 12and the outer walls oi. the shank 25 and. Serves to withstand thehydraulic pressure of liquid, as oil, thatmay be pumped 'from theouter-end compartment 37 olf the cylinder 12 into the annularcompartment 38 that surrounds the shank 25.`

The cylindrical block 24 is recessed for the reception of bolt'engagingdogs 40 that are provided with relatively sharp edges 41 which areheldin engagement `with the bolt 8 bysprings 42 the upper roundedcorners 43 of the dogs; being adapted to: bea.`

against the walls of the block 24 in such a manner that the sharp edges41 wedge with a cam like effect against the bolt `8. .The front sides oithe dogs are`engaged, adjacent the bolt 8, by pins 44 that project ashort distance outwardly from the front wall of the block 24 andarearranged so that they will strike against the wall of the cap 14 andei'ect the release of the dogs 40 when the smaller cylinder 11 has beenwithdrawn by the contraction of the' spring 36 to the limit of itsmovement into the larger cylinder 12.

Oneend of the tension spring 36 is secured to the cylinder head 27 byclip members 45 so that the spring will ordinarily exert a pull thattends to telescope the two cyliuders 11 and 12,

` The side of the partition wall27` facing the chamber `37 is recessedas at 46101: the

l reception of a plug 47 having a conical valve guided by a valve stem51 that is reciprocable` within suitable passageways in the plug 47 andwall 27. p

The recess 46 is connected by passageways 52 and 53 with the inner endof a cylindrical chamber 54 in the shank 25, the chamber 54 beingadapted for the reception or' a reciprocable piston rod 55 upon the endof which is secured a cup shaped packing washer 56;Y j .l

The piston rod projects outwardly through a gland 57 in the end wall 58of the cylindrical member 12 and is pivotally connected with one end ofalV link 60, the

other end of the link 60 being .pivoted to a lever arm 61, one end ofwhich is lulcrumed on a pin 62 that is rigid with a housing 63 and theother end o which projects outwardly through a slot 64 in 'such housing.The housing 63k isrigidly secured to the. end wall of' theouter cylinder12 `by screws 65 and if desired may have a handhold provided thereon.

The partition wall 27 is provided at a point removed from the recess 46. with a threaded passageway `that extends entirely through such wallandv wherein may be ins'erted a valve plug 66 having a valve cham# ber67 provided with a` seat 68 for a valve 7 0, the valve 70 normally beingheld in a closed position by a spring 71 that is held. in contact withthe valve 7 O by a small perforated plug 72 which is screwed into theend of the valve plug` 66. The valve chamber 67 is connected bypassa'geways 73 and 74 with the inner end of the cylindrical pumpchamber' 54. ,j l

The'partition wall 27 may have avalve 75 in `the form of a pet cockprovided therein which valve has a stem 76 that pro jects outwardlythrough the side wall of the cylinder 12 so that it may be turned toopen and close the valve'and permit the return ,flow of oil from the 3Sto the chamber'37.

The lever arm 61 shown in the drawings y is adapted to be worked by anextension handle not shown. having a socket that lits cylinder' l1telescoped as liarV as possible` into the outer cylinder 12, is placedover the bolt7 the end. of thebolt projecting into vthe recess in theblock 24 and being enga-ged and held by the dogs 40. V i

The lever arm 61 is then moved backand forth to reciprocate the pistonrod 55 and cause liquid to be drawn from the chamb'er37,y past the valve50 through the pas sageways 52 and 53 into the pump chamber pressurechamber i 54 and then to be forced out of the pump chamber 5a throughthe passagevvays 73 and 74 and past the valve 70 into the chamber 3Sthus creating a pressure in the chamber 38 that tends to move thetelescoped. cylinders 11 and 12 iii opposite directions thereby exertinga pressure against the collar l5 and a pull on the bolt S and tending todraw the tivo plates 6 and 7 together.

Then the tivo cylinders 11 and l2 have reached the limit or' theirmovement of extension so that they occupy substantially the relativepositions shown in Fig. l, the relier' valve 75 may be opened therebypermitting the spring 36 to contract and telescope the cylinder 1l intothe cylinder 12, the liquid flowing trom the compartment 3S into thecompartment 37. As the inner cylinder l1 approaches the limit of itsmovement into the cylinder l2 the Wall ot the cap l-l will strikeagainst the pins dat and release the dogs el() thereby permitting thebolting up machine to be removed from the di'aiv bolt S, leaving thecollar 15 securely clamped on such bolt and holding the plates 6 and 7together. The collar l5 may remain on the bolt S until the plates 6 andT have been riveted together after which such collar may be loosened andremoved rom the draw removed from the holes in rivet inserted in itsplace.

r1`he bolt gripping mechanism employing the balls as arranged in thecollar l5 and the bolt gripping mechanism employing the dogs a0 asarranged in the cylindrical block 2a have both been found eliicient inoperation and maybe interchanged.

Obviously changes in the precise form of construction and arrangement ofthe various parts of this device may be resorted to Within the scope ofthe claims.

lVhat 1 claim is- 1. Bolting up mechanism comprising'a draw bolt, alocking collar movable on said bolt and arranged to grip the same andmeans i'or simultaneously exerting a pull on said bolt and a pressure onsaid collar.

2. Bolting up apparatus comprising a draw bolt adapted to be passedthrough holes in plates, a locking collar arranged to fit over said drawbolt and automatically grip said bolt and means for simultaneouslyexerting a pull on said bolt and a pressure on said collar to force saidplates together.

3. Apparatus of the class described comprising a dravv bolt having ahead on one end and adapted to be inserted through perorations inplates, means arranged to be placed over said dravv bolt on the side ofsaid plates opposite said draw bolt head Jfor gripping and holding saiddravsT bolt, and mechanism for exerting a pull on said drav: bolt and apressure on said bolt gripping means. i

the plates and a bolt, the draw boltV Y walls ol'i said sleeve,

Afor automatically fl. Mechanism for drawing and clamping platestogether diical bolt having a head on one end and adapted to be insertedthrough holes in plates, a collar arranged to lit over said f bolt on.the side of said plates opposite said lbolt head, meansv iii said collarfor auto-V matically'gripping said bolt to prevent said collar frombeing removed from said bolt and means for simultaneously exerting apull on said bolt and a pressure on said collar to dran' said platestogether.

5. Mechanism for holding plates together comprising a smooth cylindricalbolt having a head on one end, a sleeve movable lengthwise on said bolt,said sleeve having an internal recess of larger diameter than said boltand formed With converging Walls, a ball bearing cage in said recess andai'- ranged to project outwardly from the end thereof, and balls in saidball bearing cage arranged to Wedge between the converging walls of saidsleeve and the periphery of said bolt to lock said sleeve on said bolt.

.6. Mechanism for holding plates together comprising a smoothcylindrical bolt having a head on one end, a sleeve movable lengthwiseon said bolt said sleeve having an internal recess` of larger diameterthan said bolt and formed with converging walls,

comprising a smooth cylinv balls arranged to Wedge between the pe- Yripliery of said bolt and the converging means for guiding andsupporting said balls and spring mechanism for yieldingly holding saidballs in engagement with said bolt and 'said converging Walls.

7. A boltiiig up device comprising a dravv bolt, a locking collarmovable on said draw bolt and arranged to automatically grip the same, apiston member arranged to abut against said locking collar, a cylinderWithin which said piston member isl slidably mounted, means secured tosaid cylinder Jfor gripping the end of said draw bolt, and hydraulicmeans for creating a pressure Within said cylinder to exert a pull onsaid bolt and a pressure on said collar.

8. A bolting up device comprising a draw bolt, a locking collar movableon said draw bolt and arranged to automatically grip the same, a. pistonmember arranged toi abut against said locking collar, a cylinder Withinwhich said piston member is slidably mounted, means secured to saidcylinder for gripping the end of said dravv bolt, devices releasing saiddraw bolt gripping means as said piston member appreaches the limit ofits movement into said iso Y to divide said bolt and arranged toautomatically grip the same, a cylinder having a liquid reservoir andaspressure chamber, meanst'oa pumping liquid from said reservoir intosaid pressure chamber, a piston member movable Within said cylinder andarranged to abut against v said locking collar, a shank secured tosaidcylinder and arranged to project into said piston member, and meansWithin said piston member for `grhoping the end of said draw boltwhereby when liquid is pumped into said pressure chamber a pull will beexerted on said will be exerted against said locking collar.

10. A bolting up device comprising a cylinder, a head forming a closurefor one end of said cylinder, a partition wall spaced from said head andrigid with said cylinder cylinder into a liquid reservoir and a pressurechamber, means for pumping' liquid from said liquid` reservoir into saidpressure chamber, a shank secured to' said partition and extendingaxially of said cylinder, a piston member arranged to fit Withinsaidcylinder and movable lengthwise thereof the end oi said pistonmember forming one end oi said pressure chamber and said shank extendinginto said piston member, a recessed cylindrical block secured'to the endof said shank, gripping dogs disposed Within the recesses in saidcylindrical block, a` draw Abolt liayinga head on one end, and a lockingcollar movable on said draw bolt and arranged to automatically grip thesame, the end of said draw bolt being arranged to be engagedpand held bysaid gripping dogs.

draw bolt and a pressure il., A bolting up device comprising acylinder`v` a head foaming a closure for one end oit said cylinder, apartition Wall spaced Jfrom said head and rigid with said cylinder todivide said cylinder into a lquid reservoir and a pressure chamber, asha-nk secured to said partition and extending` axially of said cylindersaid shank being bored to form a pump chamber, a pump `piston`reciprocable in said pump chamber, valve mechanism in said partitionWall, ports connecting said valve mechanism with said pump chamberwhereby liquid may be pumped from said liquid reservoir into saidpressure chamber, a piston member arranged to t within said cylinder andmovable lengthwise 'thereof the end of said piston member forming oneend of said pressure Vchamber and said shank extending into said pistonmember, a spring for moving said piston member into said cylinder, arecessed cylindrical block secured to the cnd of said shank, grippingdogs disposed Within the recesses of said cylindrical block, a drayrbolt having ahead on one end andadapted to be inserted throughperforations in plates that are to be drawn together, and a lockingcollar movable on said draw bolt and arranged to automatically grip thesame, the end of said draw bolt being arranged to be engaged and held bysaid gripping dogs, whereby when liquid is pumped into said pressurechamber said piston member will press against said locking collar and apull will be exertedon said draw bolt.

Signed at Seattle, lVashington, this 5th day of March, 1919. y

ARCHER B. CLARK.

